So that also means we could be seeing a huge jump in m43 resolution - it seems like the highest are still 20-24 megapixels for stills. Supporting 8k would mean supporting at least 32 megapixel stills (a bit less if the 8k is interpolated).

8k will be here long before 2020 games, this is just a given. It may come on a G before a GH model, but that's just a guess. The global shutter organic sensor will be here in time for the games, maybe much earlier. 8k must be released soon to stay competitive since sony and canon will be doing the same. 8K for the olympics was announced very early, if memory serves me before the gh4 came out, it was half marketing since this was the time Tokyo got the Olympic bid and half a conservative prediction about when 8k would become the new pro-sumer standard. In simple terms, Panasonic is not going to wait till the 2020 olympics, while others release 8k in 2018.

GH6 seems an incomplete 8K camera, if only shoot 24/ 25 / 30. And SD card with UHS-ll is still very expensive, if they can record into SSD from Type-C like backmagic will be wonderful.

Since GH line has advantage on video recording, I think Panasonic needs to develop new high standard lens for video. I am not sure how many parfocal lens existing in M43 system. But just like Fujinoon MK Zoom lens or broadcasting lens with auto focus will gives M43 a big support.

Without making the GH6 a lot bigger (and probably more expensive), I couldn't even imagine how they would do 8k at any higher frame rates. That's a lot of IO/processing power. Instead of lamenting that, maybe celebrate that there's a good chance that 4kp120 (or higher?) should be available/possible and is still more resolution than you're likely to need any time in the near future.